Lubricating system for mining-machine gearing.



N. PEDULLA.

LUBRICATING SYSTEM FOR MINING MACHINE GEARING.

APPLICATION FILED JULY 25. 196.

Patented Dec. 19,1916.

2 SHEETSSHEET 1.

N. PEDULLA.

LUBRICATING SYSTEM FOR MINING MACHINE GEARING.

APPLICATQN FILED JULY 25. 1916- l,2Q8,826. Patented Dec. 19,1916.

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Leos-seer To all whom it may concern: if

and State of Pennsylvania, have invented certain new and useful Improvements in Lubricating Systems for Liming-Machine Gearing, of which the following is a full,

clear, and exact specification.

10 I 1 c I v a I a .lHlOIlCELtlIIg the gearlng of Immng machines,

This invention relates to systems for especially coal cutting machines having a plurality of boring tools, and it has for its objectto provide improved means for lubricating the gearing employed for driving said boring tools. I.

A further ob ect s to shieldthe operating mechanism, especially the gearing, from dust'which is Created in large quantities by the cutting of the coal and which would otherwise be very apt tolclog the gearing and interfere with the proper lubrication thereof. a p

Other objects will appear as the description proceeds.

'The invention will be first hereinafter described in connection :vvith the acoom panying drawings, which constitute part of this specification, and then more specifically defined in the claims at the end of the description.

In theaccompanying drawings, wherein similar 7 reference characters are used to designate corresponding parts throughout the several viewsrFigure 1 is a side elevation of a coal cutting machine equipped iwith motor driving means substantially in detailed section through the spacing sleeves andsplined beveled pinion on one; of the a accordance with the present invention, said machine being shown supported in position as when cutting a kerf about half way up a wall of coal. Fig. 2 is a broken plan view of the machine drawn to a larger scale.

Fig. 8 is a complete'plan view. Fig. 4 is a longitudinal vertical section taken centrally through the machine. Fig. 5 is an enlarged bit-carrying shafts, said shaft being also shown in engagement with one of the internally screw-threaded passages in one of the cross bars ofthe frame. Fig. 6is an mder plan view of the coverfor the large gear wheel and small gear-s which mesh Specification of Letters Patent.

Application filed July- 25, 1916. Seri al No. 111,131.

Patented Dec. 19, rain.

ing side members 1 connected at thebottom by a front plate 2 and a rear cross piece 3, and atthe top'by a front top plate 1 and a rear top plate 5. The side members 1 have square holes 6 formed therein to receive similarly shaped reduced end portions? of crossbars 8 having internally screw-threaded passages 9 to be operatively engaged by the threaded shafts 10. There are preferably two of these cross bars 8, one being arranged near the frontend of the machine and the other spaced rearwardly therefrom a suflicient distance to allow for the proper arrangementof the driving gears as will be hereinafter described. The two cross bars 8 arerigidly fastened together by tie rods 11, Fig.2, one of which is arranged at each end of said cross bars and each of which has reduced ends passed through the Crossbars and secured-thereto by nuts 12.

Any suitable number of shafts 10 may be employed, but seven is the preferred number, as shown in Figs. 2 and 3.- Each of these shafts engages alined screw-threaded means of which a beveled pinion 22 is sphned thereto. The beveled pinion 22 is -positioned between the two cross bars 10 by a pair of spacing sleeves 23, one of which is arranged at each side of each pinion. The relative lengthsof the sleeves 23 vary on the'different shafts, so that the pinions 22 on the seven shafts are arranged in an arc in a horizontal plane.

r The front top plate a has seven short vertical shafts 2 1 journaled therein and arranged in spaced relation and in an arc to correspond with the positions of the pinions 22 on the shafts 10. Each of the shafts 24 carries a beveled pinion on its lower end below the plate 4 to mesh with one of the pinions 22. A gear 26 is carried by the upper end of each of the shafts 24 and is arranged on the upperface of the plate 4. All seven of the gears 26 mesh with a large gear wheel 27 also journaledon the plate 4.

Each of the shafts 10 carries a boring tool or bit 28 on its forward end. These bits have plug and socket connections with the shafts and are retained on the shafts by set screws 29. The cutting end 30 of each bit is of greater diameter than its shank, and alternate ones of the shafts are arranged slightly in advance of the others so that said 'fiared cutting ends 30 of the bits will overlap one another as clearly shown in Fig. 3. It will be understood, of course, that the spacing of the shafts 10 is determined so as to provide for this overlapping of the flared cutting ends of the bits. The shafts 10 are headed on their rear ends, as at 31, to form stops against the rear one of the cross bars 7 8 for limiting the advance of said shafts.

While only the heads on alternate ones of the shafts will come in contact with the rear cross bar 8, thiswill be sufficient to stop the advance of all of the shafts. Of course,

alternate ones of the shafts 10 may be made will be interchangeable.

The rear top plate 5 of the frame has a gear 32' journaled therein and arranged to mesh with the large gear wheel 27 The plate 5 also carries suitable operating means, such as a reversible motor 33 adapted to drive the gear 32 in opposite directions. l/Vhen the gear 32 isrotated in one direction it will act through the large gear wheel 27, the seven gears 26, shafts 24 and pinions 25 and 22 to turn the screw-threaded shafts 10 in the threaded passages 9 in the cross bars 8 so as to advance said shafts and the bits 28 carried thereby. By reversing the motor, the gearing may be operated in the opposite direction for withdrawing the shafts 10 and bits 28 after-the cut-ting operation has been completed. It will be understood that the ratio of the gears may be varied as may be found necessary or desirable for regulating the comparative speeds of the drills and motor armature. V

In order to protect the gearing from dust,

the front edges of the plates 2 and 4, Fig. 4,

are provided with flanges 43 and 44, respectively, engaging the lower and upper faces of the front cross bar 8, and the seven gears 26 and greater portion of the large gear wheel 27 is covered by a boxing 45 semicircular in form and having a depending annular flange 46 restingupon the upper and is providedwith seven small, discharge spouts 48 adapted to deliver the oil'in small quantities upon the seven gears 26. The

reservoir 47 is provided with a filling nozzle 49 extending up through the boxing .45. The oil delivered by the spouts upon the gears 26 will work down their peripheries,

thus lubricating the meshing teeth of the large gear wheel, and will further pass'down the short shafts 24, lubricating their journals, and finally reach the pinions 25 and 22 where it will also serve to lubricate them. Any surplus of oil which does not find its way down through the plate 4 around the shafts 24 will collect in arcuate grooves 50 formed in the upper surface of the plate 4, Figs. 2 and 10. A passage 51 leads from each of the grooves 50 through the plate 4 and discharges the oil which accumulates in said grooves upon the pinions 25.

To provide for rigidly holding the frame of the machine stationary during the ad vance of the shafts 10, perforated lugs 52 are swiveled to the side members 1, and

rods 58, Fig. 1, are passedthrough the perforations in saidlugs and secured by set screws 54. The rods 53 may extend from the floor to the ceiling of the mine'chamber, thereby allowing for the machine to be moved upward along said rods for cutting at different levels, the set screws 54 serving to support the machine at any desired level.

Having thus described my invention, what I claim as newand desire to secure by Letters Patent of the United States is:

1. In a lubricating system for gearing, the combination with a horizontal plate, a vertical shaft journaled therein, a gear carried by the lower end of the shaft below the plate, a gear on the upper end of the shaft above the plate and a cover for said upper gear, of an oil' reservoir carried by said cover and having means for dropping oil onto the upper gear, said plate having a passage therethrough for permitting oil which drops from the upper gear onto the plate to pass through the same and befldelivered onto the gear on the lower end of the shaft. v

2. In a lubricating system for gearing, the combination with a horizontal plate, a plurality of vertical shafts journaled therein, gears carried by the lower ends ofthe shafts below the plate, and gears on the upper'ends of the shafts above the plate, of means for feeding oil onto the upper gears, said plate having grooves arranged between the gears and passages leading from said grooves and arranged above the lower gears for the purpose specified.

3. In a lubricating system for gearing, the combination with a horizontal plate, a

plurality of vertical shafts journaled therein, gears carried by the lower ends of the shafts below the plate, and gears on the upper ends of the shafts above the plate, of an oil reservoir arranged above the upper gears, and individual discharge spouts for delivering oil from the reservoir to the several upper gears, the plate having grooves arranged between the gears and passages leading from said grooves and arranged 10 above the lower gears for the purpose specified.

In testimony whereof I have signed my name to this specification.

NICOLA PEDULLA.

copies of this patent may be obtained for five eents each, by addressing the Commissioner of I'atents, Washington, D. G. 

